An Alabama teacher has been investigated by the Secret Service after allegedly using a hypothetical assassination attempt on President Barack Obama as a way to teach geometry.

Corner High School employee Gregory Harrison was conducting a lesson on parallel lines and angles when he apparently demonstrated where a person should stand in order to successfully shoot the president.

The Birmingham News reports that the unusual learning technique was later alerted to authorities, leading to the local Secret Service getting in touch with Harrison.

Advertisement - Continue Reading Below

Birmingham Secret Service special agent Roy Sexton confirmed that his agency spoke with the teacher, adding: "We did not find a credible threat. As far as the Secret Service is concerned, we looked into it, we talked to the gentleman and we have closed our investigation."

According to The AP, Harrison has been placed on paid administrative leave and may be fired from his job.

Corner High School's superintendent Phil Hammonds remarked: "There is nothing that can be said to rationalise what he said. We take this very seriously. There is no place in our society for a person to make these comments."